I have designed a web site using photoshop and am optimizing it for the web using image ready. slicing ....and all that.  When I save it for the web though I am loosing a lot of pic information and my images I have imbeded in the page are coming out grainy.  The conversion from image to web document is turning the images into gifs and I am loosing color information.  I have gone to preferences and played around with the settings but that didn't seam to help.  Does anyone know how I can turn the page I have built into a working web document easily wouthout loosing any quality in my images. 

On a side note I usually build my pages in photoshop, convert in image ready, and tweak in Dreamweaver.  I usually do not have many photos though.  My graphics are fine just the images are loosing quality.  Can anyone help?